Abstract: Described herein are computerized methods and systems for user authentication using an imaged machine-readable identity document. A server receives an authentication request from a first client device, including image files corresponding to a user's machine-readable identity document. The server displays on the first client device user-identifying data elements extracted from the image files. The server captures additional user-identifying data elements from the first client device, and verifies the user's identity based upon the user-identifying data elements. The server determines user contact channel data based upon the verified identity. The server displays the contact channel data on the first client device, and generates a transient access code upon receiving a contact channel selection.